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  1. ( 20 + 8 x 0.5 ) / ( 20 - ? ) = 12
    1. 8
    2. 18
    3. 2
    4. None these
Correct Option: B

Let (20 + 8 x 0.5) / ( 20 - y) =12
Then, 24 =12 x (20 - y)
∴ 12y = 216
⇒ y = 18


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